Admin manually taking payments & adding to orders

Hi guys,
I have two questions I'm hoping you guys can help with, because until now I've only ever used OpenCart for simple downloadable goods where manual intervention was a non-occurrence.

Question 1) If a customer places an order with their credit card, and phones up later to add another product or increase quantity of their order, when making the changes to the order from the admin panel, does this automatically re-charge their card? I realise it may be dependent on which payment module I use, but I'm open to suggestions at this point.

Question 2) If a customer phones up and wants to place an order over the phone, and an admin creates the order via the admin panel, which payment module will allow me to do this manual order with card details given over the phone?

Sorry if these are painfully obvious questions, but I need to choose a payment gateway / provider for my client and want to make sure everything's seamless and they dont have to make manual CNP transactions on the POS reader which may lead to mistakes being made and payments going 'missing'.

Many thanks,
Jack